Gas heater



GAS HEATER Original Filed Oct. 3U, 1924 fNVf/YToR; FEDERICK.' M. IVI/NER.

HTTH/YEY.

Reissued Oct. 9, 1928.

UNITED STATES ne. unes PATENT carries.

FREDERICK M. MINER, JR., OF MADISON, WISCONSIN.

GAS HEATER.

Original No. 1,568,610, dated A causing a streng suction; second, to provide' a member lfor ignifying gas mixed with air by the carburetor, whether the gas is natu# ral, fuel, or the product of volatile liqulds;

` l third, to provide a safety valve between -the coil andexhaust fan to eliminate danger from an explosion in the coil, in case the combustible mixture should be drawn into the coil before the ignifying member is in opera- 90 tion. l

I attainthese objects by the mechanism shown in the accompanying drawing in whichv Fig. 1, is a plan when attached to a hori- 5 zontal boiler partly in section;

Fig. 2, is a vertical longitudinal section on line C-D of Fig, 3;

Fig. 3,'is a right end elevation; p, Fig. 4, is a transverse section on line A-i-B 3.Fie- 2;

Fig. 5, is a horizontal section through a. horizontal boiler with device installed, on reduced. scale.-

SimilarI numerals refer to similar parts V 8a throughout the several views.`

The body 1 is a cylindrical T wit-h a head Qrsccured into the left end, and a sleeve 3 secured into the right. end, a nipple 4 is threaded centrally into the head 2 with a seat formed 4o on the outer end for a valve 5. Perforated bridges 6 are located in the nipple permitting gas to pass tlirough'the nipple, and they also provide a bearing for a valve stem 7, said valve stem passes centrally and longitudinally through the bridges G and through a larger perforated bridge 8 to a larger valve 9 which seats against an annular wall 1() in the sleeve 3. An extension ofthe valve stem 7 passes from the valve-9 outward beyond the end ofthe sleeve and is slidably disposed through a bar 11 across the outer end thereof,

a compression spring 12 is located on the ex tension abutting the bar on its outer surface, and is compressible by a wing nut 13 threaded ,5,5 to the outer end of the extension. A flanged January 5,1926, Serial No. 746,879, filed October 30, 1924. Application for reissue filed March 8, 1927. Serial No. 175,392.

'cylindrical member 14 is threaded to the branch 15, and by a flange 16 is secured to a boiler 17. An ignif-yi'ng member 18 is located through 11 and electrically connected to a battery or within an electric circuit. The operation of this device is as follows. The

coil is located within`a casing .or boiler, gas 1s conveyed to the valve 5 which is by stem 7 connected to a much larger valve 9 and both are held to their lseats bylthe spring 12, and as thev valve 9 is open to the atmosphere a vacuum formed within the coil 19 will overy come the resistance of the spring 12 and open both valves, gas will {iow through valve 5 and air through the valve 9,'the two uniting will flow upward 'through the perforated bridge 2O at the bottom of member 14, and be ignited by the member 18 and pass through the coil 19 as a live flame, and the heat be transmitted through the metal of the coil to the water within the boiler. An exhaust fan 21 is provided for sufficient draft, and a safety' valve 22 is installed between the coil and fan, to take care of explosions.

Having thus described my invention, l'

claim:

1. .In a device of the kind described, a boiler,.a`coil of pipe disposed therein, a pipe fitting in the form of a T, ahead at one end of the top of the T, a sleeve at the opposite end 4of said top, a valve stem sldably mounted centrally within the top of the T by means of perforated bridges inthe head and sleeve,

valves at both ends of the stem opening inthe same direction, one end being adapted for connection with a source of combustible fluid, and the other end communicating with the atmosphere, a tubular member secured to' the stem of the T, a Vperforated bridge adjacent one end of said member and means at the opposite end connecting it to said coil of pipe, an exhaust fan connected to the other end of the coil, a safety valve interposed between the coil and fan, and means for igniting a combustible mixture supplied through said T before it enters the coil.

` 2. A boiler o r water heater comprising, in combination, artank, a fire-tube heating coil within the tank, a carburetor connected to deliver a fuel mixture to. one end of the coil, said carburetor having a fuel 'control valve andan air control valve, means to ignite the fuel mixture'as it is delivered to the coil, means to create a draft through the coil whereby the flame is propagated substanmuy throughout the len h of the coil, aid Avalves being oFei-able by t e draft means.

3. In a boi e 5 `retorl connected to one end of said tube, control means for the carburetor, an igniter adjacent to the carburetor; and a suction device also connected to 'said tube to propagate-"a flame substantially throu hout the 10 lenth thereof, said control means ing opera le by the suction means. A 4. In a boiler or water heater, a tank, a `fire-tube heating coil passin therethrough,

means to supply an -ignitab e fuel mixture'` 15 to one end ofv the coil, said means including lal T r orwater heater, a tankQa vfire-tube extending therethrough, a'vcarbu-y shaped casing having inlets at its-opposite 'ends for fuel and air and an outlet 'I intermediate its ends for themixture of fuel and air, valves in the casing to control the,

inlet of fuel and air, a tubular member connecting the outlet to the coil, an electric igniter in the tubular member for the fuel mixture, a suction fan connected to the other end of the coil, and a safety valve between said c Oil and said fan'.

In testimony, that I claim the foregoing Y las my own, I have hereto affixed my signature; o 

